question_answer 60)

  When zinc metal is treated .with a dilute solution of a strong acid, a gas is evolved, which is utilized in the hydrogenation of oil. Name the gas evolved. Write the chemical equation of the reaction involved and also write a test to detect the gas formed.        

Answer:

  When zinc reacts with dilute solution of strong acid (like hydrochloric acid HCI), it forms salt and hydrogen gas is evolved which is used in hydrogenation of oil. To test the presence of Hg gas when a burning splinter is brought near the mouth of the test tube, the gas burns with a pop sound.